Lawrence Gordon Tesler (April 24, 1945 – February 16, 2020) was an American computer scientist who worked in the field of human–computer interaction. Tesler worked at Xerox PARC, Apple, Amazon, and Yahoo!
Tesler developed the idea of copy and paste functionality and the idea of modeless software.
Tesler died in Portola Valley, California on February 16, 2020, at the age of 74